Here are pics as promised.
What i did was make it fit 4 cell or 7.4 lipo saddle pack grouped together as a brick pack. This was based on the dimensions of the new trackpower lipo. I moved the electronics to the rear so you can center the brushless speedo to balance the car without adding weight. You also use less wire which helps with any voltage loss through long wires. Another plus is that it gives you centralized mass from side to side and front to rear helping the car rotate better. You will also be using the weight of the brushless speedo when running lipo to your advantage by adding that weight to the back of the car.
I went with losi style battery mounting with a dropout tray that is fixed with 2 4-40 screws to remove the battery out of the bottom of the car. There is adjustable flex points in the chassis for tuning to different track.
I really hope you guys like what i have come up with. We track tested the car and it really was amazing.